Injection mold

Abstract

The invention relates to the field of molds, in particular to an injection mold which comprises a fixing ring with two supporting leg plates symmetrically arranged on the outer side, a bottom mold frame rotationally arranged in the fixing ring, a plurality of bottom mold bases evenly arranged on the bottom mold frame in the circumferential direction, and a raw material box sliding on the two supporting leg plates in a lifting and limiting mode through two sliding rod frames. A plurality of injection mechanisms are evenly arranged at the lower end of the raw material box in the circumferential direction, an upper mold is fixed to the lower end of each injection mechanism, the number of the bottom mold bases is two times that of the upper molds, the bottom mold bases can be driven to conduct one-time transposition rotation of the bottom mold bases and the upper molds when the raw material box ascends and descends once, and an ejection mechanism is arranged in each bottom mold base. A guide mechanism is fixed between the two supporting leg plates below the fixing ring, the ejection mechanism and the guide mechanism are matched to eject a formed product out, and when the raw material box descends, the product is shifted away from the bottom mold frame through the shifting mechanism. Multiple products can be machined at a time, continuous machining can be achieved, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of molds, in particular to an injection mold. Background Art

[0002] Injection molds are mainly used to produce plastic products. The heated and melted material is injected into the mold cavity by high pressure, and after cooling and solidification, the molded product is obtained. In the industrial field, it is a processing method used in mass production. At present, most of the existing injection molds are single-piece operations. One injection can only process one product, which cannot form continuous processing and has low processing efficiency. Summary of the invention

[0003] The object of the present invention is to provide an injection mold which can process multiple products at one time and can process continuously, thereby improving processing efficiency.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] The cam frame is provided with a plurality of bottom film seats evenly arranged on the bottom film seat, and a raw material box which is lifted and limitedly slid on the two supporting legs by two sliding rod frames respectively. A plurality of injection mechanisms are evenly arranged on the lower end of the raw material box. An upper mold is fixed to the lower end of each injection mechanism. The number of the bottom film seats is twice the number of the upper molds. The upper mold and the bottom film seats are spaced correspondingly in sequence. A transmission shaft is rotated on one of the supporting legs. One end of the transmission shaft is driven by the bottom film seat, and the other end is driven by a transmission wheel through a one-way bearing. A rack is fixed on the corresponding sliding rod frame. The rack is meshed with the transmission wheel for transmission, so that the raw material box can be lifted and lowered once, and the bottom film seat can be driven to perform a same-direction transposition rotation of the bottom film seat and the upper mold. An ejection mechanism is arranged in each bottom film seat. A guide mechanism is fixed between the two supporting legs below the fixed ring. As the bottom film seat rotates, the ejection mechanism cooperates with the guide mechanism to eject the molded product. When the raw material box descends, the product is pushed away from the bottom film seat by the toggle mechanism.

[0006] The injection mechanism includes a channel tube whose upper end is fixed to the raw material box, a piston fixed to the lower end of the channel tube, and an inner cavity tube with a sealing sleeve arranged on the piston. The upper mold is fixedly connected to the lower end of the inner cavity tube, and a spring I is arranged between the lower end of the piston and the lower end of the inner cavity of the inner cavity tube.

[0007] The bottom mold frame includes a coaxially arranged outer ring and inner ring, and a ring plate and a rotating disk respectively fixed at the upper and lower ends between the outer ring and the inner ring. Each bottom film seat is fixed through the ring plate and the rotating disk, and the rotating disk is connected to the transmission shaft.

[0008] A communicating hole is arranged on the outer ring at a position corresponding to the bottom membrane seat, and two connecting pipes are symmetrically fixed on the ring plate.

[0009] The ejection mechanism includes a push plate located inside the bottom film seat, and a push rod penetrating the lower end of the bottom film seat and fixedly connected to the push plate. A spring II is provided between the lower end of each push rod and the bottom film seat.

[0010] Each bottom film seat is provided with a groove inside, and the push plate can slide into the groove.

[0011] The guide mechanism comprises a ring seat with two ends fixed to the leg plates, a plurality of protrusions are evenly fixed on the ring seat, the plurality of protrusions are arranged in a plurality of offset positions, and the lower end of the push rod is in contact and sliding connection with the protrusions.

[0012] The toggle mechanism includes a plurality of U-shaped frames fixed on the inner ring of the ring plate, and the plurality of U-shaped frames correspond to the plurality of bottom film seats one by one. A horizontal axis is rotated at the upper end of each U-shaped frame, and a toggle plate is fixed on the horizontal axis. A torsion spring I is provided between the horizontal axis and the U-shaped frame, so that the horizontal plate close to the bottom film seat side of the toggle plate presses against the U-shaped frame, and an arm plate is rotated in the middle of the horizontal axis, and a limit plate is fixed on the toggle plate. A torsion spring II is provided between the horizontal axis and the arm plate, so that the arm plate rotates away from the horizontal plate and presses against the limit plate. At this time, the arm plate is perpendicular to the toggle plate, and a push tube is fixed at the lower end of the raw material box.

[0013] A central shaft is rotated at the center of the bottom plate at the lower end of the raw material box, and two stirring plates are fixed on the central shaft.

[0014] Two arc-shaped plates are also fixed on the central axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of an injection mold;

[0016] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0017] Figure 3 It is a schematic diagram of the structure of the fixed ring;

[0018] Figure 4 It is a structural schematic diagram of the bottom mold frame;

[0019] Figure 5 It is a structural schematic diagram of the rotating disk and the bottom film seat;

[0020] Figure 6 It is a schematic diagram of the structure of the outer ring and the ring plate;

[0021] Figure 7 It is a structural schematic diagram of the ejection mechanism;

[0022] Figure 8 It is a structural schematic diagram of the guide mechanism;

[0023] Figure 9 It is a structural schematic diagram of the toggle mechanism;

[0024] Figure 10 It is a schematic structural diagram of a raw material box and an injection mechanism;

[0025] Figure 11 is Figure 10 a schematic cross-sectional structural diagram of;

[0026] Figure 12 It is a schematic structural diagram of a central shaft, a stirring plate and an arc plate.

[0027] In the figure:

[0028] Fixed ring 101; Leg plate 102; Connecting pipe 103; Transmission shaft 104;

[0029] Rotating disk 201; Bottom film seat 202; Groove 203; Outer ring 204; Ring plate 205; Inner ring 206; U-shaped frame 207; Communication hole 208;

[0030] Pushing plate 301; Thrust rod 302; Spring II 303;

[0031] Ring seat 401; Protruding part 402;

[0032] Horizontal shaft 501; Poking plate 502; Horizontal plate 503; Support arm plate 504; Limiting plate 505;

[0033] Raw material box 601; Slide bar frame 602; Rack 603; Channel pipe 604; Inner cavity pipe 605; Upper mold 606; Spring I 607; Piston 608; Pushing pipe 609;

[0034] Central shaft 701; Stirring plate 702; Arc plate 703. Specific implementation manners

[0035] As Figure 1-12 shown, a detailed description of the injection mold is as follows:

[0036] An injection mold, comprising a fixed ring 101 with two supporting leg plates 102 symmetrically arranged on the outside, and a bottom mold frame rotating in the fixed ring 101, a plurality of bottom film seats 202 are evenly arranged circumferentially on the bottom mold frame, and a raw material box 601 that is respectively lifted and limited and slid on the two supporting leg plates 102 by two sliding rod frames 602, a plurality of injection mechanisms are evenly arranged circumferentially on the lower end of the raw material box 601, an upper mold 606 is fixed at the lower end of each injection mechanism, the number of the bottom film seats 202 is twice the number of the upper mold 606, the upper mold 606 and the bottom film seats 202 are spaced correspondingly in sequence, a transmission shaft 104 is rotatably arranged on one of the supporting leg plates 102, and the transmission shaft One end of 104 is driven by the bottom mold frame, and the other end is rotated by a transmission wheel through a one-way bearing. A rack 603 is fixed on the corresponding slide frame 602. The rack 603 is meshed with the transmission wheel for transmission, so that the raw material box 601 can be lifted and lowered once, and the bottom film seat 202 can be driven to rotate in the same direction as the upper mold 606. Moreover, each bottom film seat 202 is provided with an ejection mechanism, and a guide mechanism is fixed between the two support leg plates 102 under the fixed ring 101. As the bottom mold frame rotates, the ejection mechanism and the guide mechanism cooperate to eject the molded product, and when the raw material box 601 descends, the product can be pushed away from the bottom mold frame through the toggle mechanism.

[0037] The two leg plates 102 support the fixed ring 101 so that the fixed ring 101 is in a horizontal state, thereby forming a support for the bottom mold frame. A telescopic rod is installed between the bottom mold frame and the raw material box 601, which can push the raw material box 601 to move up and down. This lifting movement is limited and guided by the sliding rod frame 602 that penetrates the leg plates 102, wherein the telescopic rod is an electric telescopic rod or a hydraulic rod; the raw material box 601 is used to hold the injection molding raw materials, and a heating device is provided on the raw material box 601 to heat the raw materials in the raw material box 601 to ensure that the raw materials are in a melted state. The heating device can be a resistance plate or a resistance ring;

[0038] During processing, the telescopic rod contracts, causing the raw material box 601 to descend so that multiple upper molds 606 are buckled on the corresponding bottom film seat 202. Then, as the raw material box 601 continues to descend, the injection mechanism will be squeezed, and the raw material in the injection mechanism will be squeezed into the bottom film seat 202 through the upper mold 606, filling the mold cavity between the upper mold 606 and the bottom film seat 202. When the telescopic rod is contracted to the shortest, the raw material injected by the injection mechanism just fills the mold cavity, and then the telescopic rod is controlled to extend. During this process, the injection mechanism first absorbs the raw material in the raw material box 601 for replenishment, The upper mold 606 remains buckled on the bottom film seat 202 until the injection mechanism completes the suction. As the telescopic rod continues to extend, the upper mold 606 separates from the bottom film seat 202. At this time, the product in the mold cavity has been cooled and formed. After the upper mold 606 moves to the top of the bottom film seat 202, as the raw material box 601 continues to rise, the rack 603 engages with the transmission wheel on the transmission shaft 104, the transmission shaft 104 rotates, and then the bottom mold frame rotates. After the bottom mold frame drives multiple bottom film seats 202 to rotate one position, the telescopic rod is extended to the longest.

[0039] Then continue to control the telescopic rod to retract, so that the device repeats the above action. It should be noted that when the raw material box 601 descends, the rack 603 and the transmission wheel on the transmission shaft 104 are driven to rotate. At this time, affected by the one-way bearing, only the transmission wheel rotates, and the transmission shaft 104 does not move. Therefore, when the raw material box 601 descends, the bottom mold frame remains stationary; because the rotation of the bottom mold frame occurs when the raw material box 601 rises, the ejection mechanism cooperates with the guide mechanism, and after the upper mold 606 moves to the top of the bottom film seat 202, when the raw material box 601 rises, as the bottom mold frame rotates, the ejection mechanism ejects the newly formed product and maintains this state, and when the raw material box 601 descends, the ejected product is pushed away from the bottom mold frame through the toggle mechanism, thereby ensuring that when the raw material box 601 rises next time, the bottom film seat 202 returns to its initial state and cooperates with the upper mold 606 to complete the product injection molding process;

[0040] Therefore, the injection mold of the present invention can complete one injection molding through one lifting and lowering of the telescopic rod, and can process multiple products at one time. In the process of one injection molding, it can automatically complete the continuous processing of mold closing, injection molding, cavity pressure keeping and cooling molding, mold opening, replacement of the corresponding bottom film seat 202, ejection of the product, and pushing away the product (mold closing), which greatly improves the efficiency of the injection molding process.

[0041] The rack 603 is described. Only a part of the lower end of the rack 603 has teeth for meshing with the transmission wheel. When the raw material box 601 is at the highest end, the rack 603 is in a meshing state with the transmission wheel. Thus, when the rack 603 descends, the meshing drives the transmission wheel to rotate, and then drives the transmission shaft 104 to rotate through the one-way bearing, thereby driving the bottom die holder to rotate. Until the teeth of the rack 603 disengage from the transmission wheel, the transmission shaft 104 stops rotating. At this time, the bottom die holder just drives the bottom film seat 202 to rotate to complete a position change.

[0042] Further, as Figure 10-11 shown, the injection mechanism is described in detail:

[0043] The injection mechanism includes a channel pipe 604 fixed to the upper end of the raw material box 601, a piston 608 fixed to the lower end of the channel pipe 604, and an inner cavity pipe 605 sleeved on the piston 608 in a sealed manner. The upper die 606 is fixedly connected to the lower end of the inner cavity pipe 605. A spring I 607 is provided between the lower end of the piston 608 and the lower end of the inner cavity of the inner cavity pipe 605.

[0044] Among them, a one-way valve I is installed inside the channel pipe 604, and a one-way valve II is installed at the connection between the inner cavity pipe 605 and the upper die 606; initially, due to the elastic force of the spring I 607, the piston 608 slides to the uppermost end of the inner cavity of the inner cavity pipe 605. At this time, as the raw material box 601 descends, after the upper die 606 is buckled on the bottom film seat 202, as the raw material box 601 continues to descend, the piston 608 will be pushed to slide down inside the inner cavity pipe 605 through the channel pipe 604, increasing the pressure of the raw material inside the inner cavity of the inner cavity pipe 605. Thus, the raw material inside the inner cavity enters the mold cavity through the one-way valve II. During this process, the one-way valve I remains closed until the raw material box 601 descends to the lowest point and then starts to rise. Affected by the elastic force of the spring I 607, the upper die 606 and the inner cavity pipe 605 remain stationary, and the piston 608 slides up inside the inner cavity pipe 605, thereby reducing the pressure of the raw material inside the inner cavity of the inner cavity pipe 605. At this time, the one-way valve I opens, and the raw material in the raw material box 601 is suctioned into the inner cavity of the inner cavity pipe 605 through the channel pipe 604 to provide raw material for the next injection molding. During this process, the one-way valve II is closed, and the upper die 606 is always buckled on the bottom film seat 202 to ensure the pressure of the mold cavity while the raw material cools and forms. Until the piston 608 slides to the uppermost end of the inner cavity, both the one-way valve I and the one-way valve II are closed, and the upper die 606 is driven to separate from the bottom film seat 202;

[0045] Among them, a heating device is also provided on the inner cavity pipe 605 to heat the raw material inside the inner cavity to ensure that the raw material inside the inner cavity is in a molten state.

[0046] Further, as Figure 4-6 shown, the bottom die holder is described in detail:

[0047] The bottom mold frame includes an outer ring 204 and an inner ring 206 arranged coaxially, and annular plates 205 and rotating disks 201 respectively fixed at the upper and lower ends between the outer ring 204 and the inner ring 206. Each bottom film seat 202 is fixedly penetrated through the annular plates 205 and the rotating disks 201, and the rotating disk 201 is in driving connection with the transmission shaft 104.

[0048] An annular inner cavity is formed by the outer ring 204, the inner ring 206, the annular plates 205 and the rotating disks 201. A plurality of bottom film seats 202 are circumferentially and uniformly distributed and penetrate through the annular inner cavity, so that the coolant inside the annular inner cavity can easily surround the outside of the bottom film seats 202, thereby forming rapid cooling of the bottom film seats 202.

[0049] Wherein, a central frame is provided at the center of the rotating disk 201 for installing one end of the telescopic rod. A connecting frame is installed at the other end of the telescopic rod and is fixedly connected to the lower end of the raw material tank 601 through the connecting frame. The outer ring 204 rotates with damping between the fixed rings 101, so as to ensure that when the rotating disk 201 is not driven to rotate, the bottom mold frame remains relatively stationary with respect to the fixed ring 101.

[0050] Furthermore:

[0051] Communication holes 208 are provided on the outer ring 204 corresponding to the bottom film seats 202, and two connecting pipes 103 are symmetrically fixed on the annular plates 205.

[0052] By connecting the two connecting pipes 103 to an external coolant circulation system, when the bottom mold frame rotates and two of the communication holes 208 are respectively communicated with the two connecting pipes 103, the coolant circulation system will circulate the coolant inside the annular inner cavity, thereby effectively ensuring that the coolant inside the annular inner cavity maintains a cooling effect.

[0053] Moreover, communication holes 208 are correspondingly arranged at each bottom film seat 202. When the communication holes 208 corresponding to each bottom film seat 202 are communicated with the coolant circulation system, it can effectively ensure the circulation of the coolant at each bottom film seat 202, avoiding the situation that the coolant cannot flow sufficiently due to the too large volume of the annular inner cavity.

[0054] Furthermore, as Figure 7-8 shown, the cooperation between the ejection mechanism and the guiding mechanism is described in detail:

[0055] The ejection mechanism includes a push plate 301 located inside the bottom film seat 202, and ejector rods 302 penetrating through the lower end of the bottom film seat 202 and fixedly connected to the push plate 301. A spring II 303 is provided between the lower end of each ejector rod 302 and the bottom film seat 202.

[0056] A groove 203 is provided inside each bottom film seat 202, and the push plate 301 can be slidably fitted into the groove 203.

[0057] The guide mechanism includes a ring seat 401 fixed to the leg plate 102 at both ends, a plurality of protrusions 402 are evenly fixed on the ring seat 401, the plurality of protrusions 402 are arranged in a plurality of offset positions, and the lower end of the push rod 302 is in contact and sliding connection with the protrusions 402.

[0058] During use, as the bottom mold frame rotates, the bottom film seat 202 with the product inside will move to the top of the protrusion 402, so that the lower end of the push rod 302 in the bottom film seat 202 contacts the upper end of the protrusion 402 and slides on the upper end surface of the protrusion 402, so that the push rod 302 squeezes the spring II 303 to gradually rise, so that the push plate 301 slides out of the groove 203, and then the product is ejected from the bottom film seat 202.

[0059] Among them, the protrusion 402 is composed of a sloped portion and a high-end flat portion. When the bottom film seat 202 carries the ejector rod 302 to rotate, the lower end of the ejector rod 302 first contacts the sloped portion and slides to the high-end flat portion guided by the sloped portion. At this time, the upper end surface of the push plate 301 and the upper end surface of the bottom film seat 202 are in the same plane, thereby ensuring that the product is completely ejected from the bottom film seat 202; at the same time, the lower end of the ejector rod 302 is in a semicircular head shape, which is convenient for sliding on the upper end of the protrusion 402.

[0060] Further, such as Figure 9-10 As shown, the toggle mechanism is described in detail:

[0061] The toggle mechanism includes a plurality of U-shaped frames 207 fixed on the inner circle of the ring plate 205, and the plurality of U-shaped frames 207 correspond to the plurality of bottom film seats 202 one by one. A horizontal axis 501 is rotated at the upper end of each U-shaped frame 207, and a toggle plate 502 is fixed on the horizontal axis 501. A torsion spring I is provided between the horizontal axis 501 and the U-shaped frame 207, so that the horizontal plate 503 on the side of the toggle plate 502 close to the bottom film seat 202 is pressed against the U-shaped frame 207. A support arm plate 504 is rotated at the middle part of the horizontal axis 501, and a limit plate 505 is fixed on the toggle plate 502. A torsion spring II is provided between the horizontal axis 501 and the support arm plate 504, so that the support arm plate 504 is rotated away from the horizontal plate 503 and pressed against the limit plate 505. At this time, the support arm plate 504 is perpendicular to the toggle plate 502, and a push tube 609 is fixed at the lower end of the raw material box 601.

[0062] When the raw material box 601 rises to the top, the bottom mold frame remains stationary. As the raw material box 601 descends, the bottom mold frame begins to rotate until the bottom mold frame rotates to a bottom film seat 202 position. The bottom mold frame remains stationary again. At this time, the product is completely ejected. As the raw material box 601 continues to descend, the push tube 609 at the lower end of the raw material box 601 will contact all the support arm plates 504 and squeeze the support arm plates 504 to rotate downward. Under the influence of the elastic force of the torsion spring II, the support arm plate 504 will drive the paddle plate 502 to move away from the bottom mold through the horizontal axis 501. The upper mold 606 is pushed away from the bottom mold frame 202 by the push plate 502 where there is no product, and the push plate 502 is pressed against the upper mold 606, so that the push plate 502 cannot continue to rotate, so that the support arm plate 504 overcomes the elastic force of the torsion spring II and rotates on the horizontal axis 501. When the raw material box 601 rises, the push tube 609 is separated from the support arm plate 504 first, and then the upper mold 606 is separated from the bottom film seat 202. During this process, the toggle mechanism is automatically reset by the torsion spring I and the torsion spring II to prepare for pushing the product away next time.

[0063] Further, such as Figure 12 As shown:

[0064] A central shaft 701 is rotated at the center of the bottom plate at the lower end of the raw material box 601 , and two stirring plates 702 are fixed on the central shaft 701 .

[0065] The central shaft 701 is driven by the first motor installed at the lower end of the raw material box 601, thereby driving the two stirring plates 702 to rotate in the raw material box 601, ensuring that the heating device of the raw material box 601 can heat the raw materials evenly and ensure that the raw materials are in a melted state.

[0066] Further:

[0067] Two arc-shaped plates 703 are also fixed on the central shaft 701 .

[0068] When the central shaft 701 drives the two arc plates 703 to rotate, the two arc plates 703 assist the two stirring plates 702 in stirring the raw materials, and at the same time, push the raw materials from the middle to the outside, thereby ensuring that the channel tube 604 is sufficient in raw materials.

Claims

1. An injection mold, characterized in that: The cam frame is provided with a plurality of bottom film seats evenly arranged on the bottom film seat, and a raw material box that is lifted and limited and slides on the two supporting leg plates by two sliding rod frames respectively. A plurality of injection mechanisms are evenly arranged on the lower end of the raw material box. An upper mold is fixed on the lower end of each injection mechanism. The number of the bottom film seats is twice the number of the upper molds. The upper mold and the bottom film seats are spaced correspondingly in sequence. A transmission shaft is rotated on one of the supporting leg plates. One end of the transmission shaft is driven by the bottom film seat, and the other end is driven by a transmission wheel through a one-way bearing. A rack is fixed on the corresponding sliding rod frame. The rack is meshed with the transmission wheel for transmission, so that the raw material box can be lifted and lowered once, and the bottom film seat can be driven to perform a same-direction transposition rotation of the bottom film seat and the upper mold. An ejection mechanism is arranged in each bottom film seat. A guide mechanism is fixed between the two supporting leg plates below the fixed ring. As the bottom mold frame rotates, the ejection mechanism cooperates with the guide mechanism to eject the molded product. When the raw material box descends, the product is pushed away from the bottom mold frame by the toggle mechanism.

2. The injection mold according to claim 1, wherein: The injection mechanism includes a channel tube whose upper end is fixed to the raw material box, a piston fixed to the lower end of the channel tube, and an inner cavity tube with a sealing sleeve arranged on the piston. The upper mold is fixedly connected to the lower end of the inner cavity tube, and a spring I is arranged between the lower end of the piston and the lower end of the inner cavity of the inner cavity tube.

3. An injection mold according to claim 1, characterized in that: The bottom mold frame includes a coaxially arranged outer ring and inner ring, and a ring plate and a rotating disk respectively fixed at the upper and lower ends between the outer ring and the inner ring. Each bottom film seat is fixed through the ring plate and the rotating disk, and the rotating disk is connected to the transmission shaft.

4. An injection mold according to claim 3, characterized in that: A communicating hole is arranged on the outer ring at a position corresponding to the bottom membrane seat, and two connecting pipes are symmetrically fixed on the ring plate.

5. An injection mold according to claim 1, characterized in that: The ejection mechanism includes a push plate located inside the bottom film seat, and a push rod penetrating the lower end of the bottom film seat and fixedly connected to the push plate. A spring II is provided between the lower end of each push rod and the bottom film seat.

6. An injection mold according to claim 5, characterized in that: Each bottom film seat is provided with a groove inside, and the push plate can slide into the groove.

7. An injection mold according to claim 5, characterized in that: The guide mechanism comprises a ring seat with two ends fixed to the leg plates, a plurality of protrusions are evenly fixed on the ring seat, the plurality of protrusions are arranged in a plurality of offset positions, and the lower end of the push rod is in contact and sliding connection with the protrusions.

8. The injection mold according to claim 3, wherein: The toggle mechanism includes a plurality of U-shaped frames fixed on the inner ring of the ring plate, and the plurality of U-shaped frames correspond to the plurality of bottom film seats one by one. A horizontal axis is rotated at the upper end of each U-shaped frame, and a toggle plate is fixed on the horizontal axis. A torsion spring I is provided between the horizontal axis and the U-shaped frame, so that the horizontal plate close to the bottom film seat side of the toggle plate presses against the U-shaped frame, and an arm plate is rotated in the middle of the horizontal axis, and a limit plate is fixed on the toggle plate. A torsion spring II is provided between the horizontal axis and the arm plate, so that the arm plate rotates away from the horizontal plate and presses against the limit plate. At this time, the arm plate is perpendicular to the toggle plate, and a push tube is fixed at the lower end of the raw material box.

9. The injection mold according to claim 1, wherein: A central shaft is rotated at the center of the bottom plate at the lower end of the raw material box, and two stirring plates are fixed on the central shaft.

10. An injection mold according to claim 9, characterized in that: Two arc-shaped plates are also fixed on the central axis.

Images